Auto-darkening welding filter



FIG. 1 is a perspective view of an auto-darkening welding filter;

FIG. 2 is a front view of the auto-darkening welding filter;

FIG. 3 is a rear view of the auto-darkening welding filter;

FIG. 4 is a left side view of the auto-darkening welding filter;

FIG. 5 is a right side view of the auto-darkening welding filter;

FIG. 6 is a top view of the auto-darkening welding filter; and,

FIG. 7 is a bottom view of the auto-darkening welding filter.

The broken lines in the drawings depict unclaimed environmental subject matter. 

CLAIM The ornamental design for an auto-darkening welding filter, as shown and described. 